## The Effect of Space Charge and Residual Gases on Thermionic Currents in High Vacuum

This is the third paper by Nordstr{o}m on his five dimensional theory. Here Nordstr{o}m attempts to base a theory of matter on the energy conservation generalized to the five dimensional case. This involves a new fundamental constant related to the elementary electric charge.

Communication by K. Schwarzschild to the Prussian Academy of Sciences, dealing with the gravitational field of a sphere of incompressible fluid.

The formal similarity of the spectral distribution curve of temperature radiation to Maxwell’s velocity distribution curve is too striking to have remained hidden very long.

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Values of rate of decay and mean life of atoms and molecules in upper quantum states calculated from data on the intensity of absorption lines.—By combining Füchtbauer's method of determining from the intensity of absorption lines the probability that a molecule will absorb a quantum of energy, with Einstein's views as to the mechanism of light abs...